@ HifiMeDIY.
Got two questions?
Have you ever considered Tenor 8802L as USB interface chip?
E.g. Audio-GD devices show clear improvements by using (async) Tenor 8802L over (adaptive) 7702L.
Are you still working on a multichannel device? If yes -- do you also consider building a multichannel USB-DAC? (That's what the DIYworld is looking for 😉 ?
----
Ah and one more ( a little off topic): As you know I'm a quite happy owner of your DDX320 (...replacing my Twisted Pear Buffalo ) - no issues with DAC outputstages, cableing, connectors, amp inputstages, asf. 😉 )
Would it be possible to attach the 4398 DAC input stage discussed over here to the DDX320 module?? It would also allow to drive the amp directly via USB!?!? And you might get rid of the CS8416 problem.
Thx
Got two questions?
Have you ever considered Tenor 8802L as USB interface chip?
E.g. Audio-GD devices show clear improvements by using (async) Tenor 8802L over (adaptive) 7702L.
Are you still working on a multichannel device? If yes -- do you also consider building a multichannel USB-DAC? (That's what the DIYworld is looking for 😉 ?
----
Ah and one more ( a little off topic): As you know I'm a quite happy owner of your DDX320 (...replacing my Twisted Pear Buffalo ) - no issues with DAC outputstages, cableing, connectors, amp inputstages, asf. 😉 )
Would it be possible to attach the 4398 DAC input stage discussed over here to the DDX320 module?? It would also allow to drive the amp directly via USB!?!? And you might get rid of the CS8416 problem.
Thx
Last edited:
Hi, soundcheck. Glad to see you.
We still use TE7022L on new DAC, although we already support 192k now, I think 7022L is good enough and will acceptable price. But I can use better chips anytime when we believe we should.😉
And I'm still working on the DDX, with slow progress as you know😱 I will try your idea, hope it works😀
Hi, already available I think.
Why shouldn't it?
It IMO makes no sense to develop and maintain two different input stages for the very same purpose. That'll save you a lot of design and maintanance related efforts/cost once it's done.
Looking forward to your feedback.
Do you mean 192k on TE7022 ? Is that possible ?
I also vote for new USB chip, either one of the TE or CM as long as it supports Linux.
I have some experience with high speed usb receivers : TE7022 (24/96) and TE8802 (24/192 asynchronous) much more expensive.
Frankly speaking, I could not hear any difference. I sold the 24/192 device (musiland monitor usd 01)
soundcheck's comment and my +1 was to investigate a multichannel usb dac. It's a different project.
Frankly speaking, I could not hear any difference. I sold the 24/192 device (musiland monitor usd 01)
soundcheck's comment and my +1 was to investigate a multichannel usb dac. It's a different project.
"Hi are you sure about using 10 kOhm in each leg of the primaries ? This is way too high. I used 1 kOhm (sounded like I used tone control) and was not satisfied and went to 470 Ohm which was an improvement.... "
I did not design the circuit I have here. I just built it on a designer supplied PCB. But you are correct about the resistors! They are 1k resistors and they work very well with the Lundahl LL-1690's. If you send me an IM I will send you a copy of the schematic but I will not post it here since it is not my design...
Mark
I did not design the circuit I have here. I just built it on a designer supplied PCB. But you are correct about the resistors! They are 1k resistors and they work very well with the Lundahl LL-1690's. If you send me an IM I will send you a copy of the schematic but I will not post it here since it is not my design...
Mark
Last edited:
Hi I'm quite new to this forum. After reading a few pages of this thread, I went and ordered the DAC.
Question: will I have issue sending the output of this DAC directly into my Rotel integrated amp (RA-02) which I use as per-amp only.
Question: will I have issue sending the output of this DAC directly into my Rotel integrated amp (RA-02) which I use as per-amp only.
Hi, whether a DAC can work with a amp, that depend on the output level of the DAC, and the gain of the amp. Also, make sure the input impedance of amp is no less than the minimum resistance of DAC. The DA-X0 output up to about 3.4Vpp on coupled output or 6.8Vpp on balanced output. And CS4398 itself drives 1kohm min load.
Hi thanks for replying. This is a commercial amps. I can just measure the input impedance by putting a multimeter across the inputs?
Yes. But I think most of amps has higher input impedance that can be used. Class-T amps is 20kohm and some class-AB chip amps even higher (up to 100kohm).
It looks like RA-02 has input impedance of 47kOhm which should be OK for the DAC?
Yes. But I think most of amps has higher input impedance that can be used. Class-T amps is 20kohm and some class-AB chip amps even higher (up to 100kohm).
You have said that there is no I2S connection on this dac but schouldn't that
be possible if the SCR is removed ?
be possible if the SCR is removed ?
- Status
- Not open for further replies.